today i went and started my racing mower and after running it for a couple minutes i got off the seat and it died, which is normal but i left the key on and acople minutes later there was smoke coming from under my flywheele, and the 25amp fuse blew. every time i put a fuse in it blows. so i onhooked the stattor and then put a fuse in and it was fine. i checked the stattor output and i go 4volts then9 then 18, then none?